Oscar finds his partner Lily's secret bucket list of things she wants to do before dying after being diagnosed with a terminal illness. The list includes getting married, which Oscar decides to help make come true. He proposes at the beach and plans a wedding in Las Vegas. However, Lily's health declines rapidly and she passes away before they can marry in Vegas. After her death, Oscar finishes and publishes her unfinished book to fulfill the last item on her bucket list.